Comment 0 for bug 1629661

Ubuntu 16.04 on 64 bit produces hissing sound (just by my - far from being 'musical' - ear, it sounds like a sinus wave with frequency about 1KHz or so) on headphones. Interestingly, after boot this does not happen and usually can be hear only after the first application which makes any sound (but not always, sometimes it starts later). But if any time it starts, it remains, whatever I do, exiting the application (which makes the sound) even by killing pulseaudio process, etc. I've read a lot on this issue but usually - it seems - always notebook problems mentioned, however it's a desktop machine (Asrock FM2A88M extreme4+ motherboard, AMD A6-6400K CPU, integrated audio). It seems it uses snd_hda_intel kernel module though. I've tried advices mentioned by various resources throughout the net, disabling powersave problems, using hdajackretask from alsa-tools-gui, etc, but they didn't help.

Ubuntu 4.4.0-36.55-generic 4.4.16

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-41-generic 4.4.0-41.61
ProcVersionSignature: Ubuntu 4.4.0-41.61-generic 4.4.21
Uname: Linux 4.4.0-41-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: lgb 2128 F.... pulseaudio
 /dev/snd/controlC0: lgb 2128 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Oct 2 14:24:21 2016
HibernationDevice: RESUME=UUID=c92777cb-b700-4a8e-b937-1ed4983fecb1
InstallationDate: Installed on 2015-07-10 (449 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-41-generic root=UUID=d203063e-78c0-425a-bee2-0e3ecb4ea74c ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-41-generic N/A
 linux-backports-modules-4.4.0-41-generic N/A
 linux-firmware 1.157.4
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/17/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.00
dmi.board.name: FM2A88M Extreme4+
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.00:bd01/17/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnFM2A88MExtreme4+:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.